X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_ring%2Frte_ring.c;h=d9b308036c58f903cde76fe0f306ad9bde0ef0e3;hb=c1077933d45b2bb6b8721746e63f5a125bd2353a;hp=934ce876b75e8afcaf2864d7be8dbc155dfe2d6a;hpb=8c82198978a1b47553e47a8caeced22f325ad573;p=dpdk.git diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c index 934ce876b7..d9b308036c 100644 --- a/lib/librte_ring/rte_ring.c +++ b/lib/librte_ring/rte_ring.c @@ -1,67 +1,11 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2015 Intel Corporation. All rights reserved. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * * Neither the name of Intel Corporation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* - * Derived from FreeBSD's bufring.c - * - ************************************************************************** +/* SPDX-License-Identifier: BSD-3-Clause * + * Copyright (c) 2010-2015 Intel Corporation * Copyright (c) 2007,2008 Kip Macy kmacy@freebsd.org * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * 2. The name of Kip Macy nor the names of other - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ***************************************************************************/ + * Derived from FreeBSD's bufring.h + * Used as BSD-3 Licensed with permission from Kip Macy. + */ #include #include @@ -86,6 +30,7 @@ #include #include #include +#include #include "rte_ring.h" @@ -118,6 +63,13 @@ rte_ring_get_memsize(unsigned count) return sz; } +void +rte_ring_reset(struct rte_ring *r) +{ + r->prod.head = r->cons.head = 0; + r->prod.tail = r->cons.tail = 0; +} + int rte_ring_init(struct rte_ring *r, const char *name, unsigned count, unsigned flags) @@ -134,15 +86,28 @@ rte_ring_init(struct rte_ring *r, const char *name, unsigned count, /* init the ring structure */ memset(r, 0, sizeof(*r)); - ret = snprintf(r->name, sizeof(r->name), "%s", name); + ret = strlcpy(r->name, name, sizeof(r->name)); if (ret < 0 || ret >= (int)sizeof(r->name)) return -ENAMETOOLONG; r->flags = flags; - r->watermark = count; - r->prod.single = !!(flags & RING_F_SP_ENQ); - r->cons.single = !!(flags & RING_F_SC_DEQ); - r->size = count; - r->mask = count - 1; + r->prod.single = (flags & RING_F_SP_ENQ) ? __IS_SP : __IS_MP; + r->cons.single = (flags & RING_F_SC_DEQ) ? __IS_SC : __IS_MC; + + if (flags & RING_F_EXACT_SZ) { + r->size = rte_align32pow2(count + 1); + r->mask = r->size - 1; + r->capacity = count; + } else { + if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK)) { + RTE_LOG(ERR, RING, + "Requested size is invalid, must be power of 2, and not exceed the size limit %u\n", + RTE_RING_SZ_MASK); + return -EINVAL; + } + r->size = count; + r->mask = count - 1; + r->capacity = r->mask; + } r->prod.head = r->cons.head = 0; r->prod.tail = r->cons.tail = 0; @@ -161,10 +126,15 @@ rte_ring_create(const char *name, unsigned count, int socket_id, ssize_t ring_size; int mz_flags = 0; struct rte_ring_list* ring_list = NULL; + const unsigned int requested_count = count; int ret; ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list); + /* for an exact size ring, round up from count to a power of two */ + if (flags & RING_F_EXACT_SZ) + count = rte_align32pow2(count + 1); + ring_size = rte_ring_get_memsize(count); if (ring_size < 0) { rte_errno = ring_size; @@ -185,17 +155,18 @@ rte_ring_create(const char *name, unsigned count, int socket_id, return NULL; } - rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_write_lock(); /* reserve a memory zone for this ring. If we can't get rte_config or * we are secondary process, the memzone_reserve function will set * rte_errno for us appropriately - hence no check in this this function */ - mz = rte_memzone_reserve(mz_name, ring_size, socket_id, mz_flags); + mz = rte_memzone_reserve_aligned(mz_name, ring_size, socket_id, + mz_flags, __alignof__(*r)); if (mz != NULL) { r = mz->addr; /* no need to check return value here, we already checked the * arguments above */ - rte_ring_init(r, name, count, flags); + rte_ring_init(r, name, requested_count, flags); te->data = (void *) r; r->memzone = mz; @@ -206,7 +177,7 @@ rte_ring_create(const char *name, unsigned count, int socket_id, RTE_LOG(ERR, RING, "Cannot reserve memory\n"); rte_free(te); } - rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_write_unlock(); return r; } @@ -226,7 +197,8 @@ rte_ring_free(struct rte_ring *r) * therefore, there is no memzone to free. */ if (r->memzone == NULL) { - RTE_LOG(ERR, RING, "Cannot free ring (not created with rte_ring_create()"); + RTE_LOG(ERR, RING, + "Cannot free ring, not created with rte_ring_create()\n"); return; } @@ -236,7 +208,7 @@ rte_ring_free(struct rte_ring *r) } ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list); - rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_write_lock(); /* find out tailq entry */ TAILQ_FOREACH(te, ring_list, next) { @@ -245,35 +217,17 @@ rte_ring_free(struct rte_ring *r) } if (te == NULL) { - rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_write_unlock(); return; } TAILQ_REMOVE(ring_list, te, next); - rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_write_unlock(); rte_free(te); } -/* - * change the high water mark. If *count* is 0, water marking is - * disabled - */ -int -rte_ring_set_water_mark(struct rte_ring *r, unsigned count) -{ - if (count >= r->size) - return -EINVAL; - - /* if count is 0, disable the watermarking */ - if (count == 0) - count = r->size; - - r->watermark = count; - return 0; -} - /* dump the status of the ring on the console */ void rte_ring_dump(FILE *f, const struct rte_ring *r) @@ -281,16 +235,13 @@ rte_ring_dump(FILE *f, const struct rte_ring *r) fprintf(f, "ring <%s>@%p\n", r->name, r); fprintf(f, " flags=%x\n", r->flags); fprintf(f, " size=%"PRIu32"\n", r->size); + fprintf(f, " capacity=%"PRIu32"\n", r->capacity); fprintf(f, " ct=%"PRIu32"\n", r->cons.tail); fprintf(f, " ch=%"PRIu32"\n", r->cons.head); fprintf(f, " pt=%"PRIu32"\n", r->prod.tail); fprintf(f, " ph=%"PRIu32"\n", r->prod.head); fprintf(f, " used=%u\n", rte_ring_count(r)); fprintf(f, " avail=%u\n", rte_ring_free_count(r)); - if (r->watermark == r->size) - fprintf(f, " watermark=0\n"); - else - fprintf(f, " watermark=%"PRIu32"\n", r->watermark); } /* dump the status of all rings on the console */ @@ -302,13 +253,13 @@ rte_ring_list_dump(FILE *f) ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list); - rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_read_lock(); TAILQ_FOREACH(te, ring_list, next) { rte_ring_dump(f, (struct rte_ring *) te->data); } - rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_read_unlock(); } /* search a ring from its name */ @@ -321,7 +272,7 @@ rte_ring_lookup(const char *name) ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list); - rte_rwlock_read_lock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_read_lock(); TAILQ_FOREACH(te, ring_list, next) { r = (struct rte_ring *) te->data; @@ -329,7 +280,7 @@ rte_ring_lookup(const char *name) break; } - rte_rwlock_read_unlock(RTE_EAL_TAILQ_RWLOCK); + rte_mcfg_tailq_read_unlock(); if (te == NULL) { rte_errno = ENOENT;